INSTRUCTIONS
1. Preheat a panini press on the 'sear' setting according to the manufacturer's instructions.
2. Place the sausage on the preheated panini press, close the lid, and cook until browned on all sides and cooked through, 20 to 25 minutes. Transfer to a cutting board. When the sausage is cool enough to handle, slice ¼ inch thick on the bias.
3. In a nonstick fry pan over medium-high heat, warm the oil. Add the onion, season with salt and pepper and cook, stirring occasionally, until soft, 5 to 6 minutes. Remove from the heat and let cool slightly, then stir in the bell peppers.
4. Adjust the panini press to the 'panini' setting.
5. Arrange the sausage slices on the bottom halves of the bread slices. Top with the onion-bell pepper mixture and sprinkle with the cheese, dividing evenly. Cover each sandwich with a top half of the bread.
